// =====================================================================================
//
//       Filename:  invalid_pthread_exit.c
//
//    Description:  pthread_exit参数的不正确使用
//
//        Version:  1.0
//        Created:  12/26/2014 12:55:45 PM
//       Revision:  none
//       Compiler:  g++
//
//         Author:   (), 
//        Company:  
//
// =====================================================================================

#include "../apue.h"
#include "../myerr.h"
#include <pthread.h>
int log_to_stderr = 1;

struct foo
{
    int a, b, c, d;
};

void printfoo(const char* s, const struct foo* fp)
{
    printf("%s", s);
    printf("    structure at 0x%lx\n", (unsigned long)fp);
    printf("    foo.a = %d\n", fp->a);
    printf("    foo.b = %d\n", fp->b);
    printf("    foo.c = %d\n", fp->c);
    printf("    foo.d = %d\n", fp->d);
}

void* thr_fn1(void* arg)
{
    struct foo foo = { 1, 2, 3, 4 };
    printfoo("thread 1: \n", &foo);
    pthread_exit((void*)&foo);
}

void* thr_fn2(void* arg)
{
    printf("thread 2: ID is %lu\n", (unsigned long)pthread_self());
    pthread_exit((void*)0);
}

int main()
{
    int         err;
    pthread_t   tid1, tid2;
    struct foo  *fp;

    err = pthread_create(&tid1, NULL, thr_fn1, NULL);
    if ( err != 0 )
        err_exit(err, "can't create thread 1");
    err = pthread_join(tid1, (void*)&fp);
    if ( err != 0 )
        err_exit(err, "can't join with thread 1");
    sleep(1);
    printf("parent starting second thread\n");
    err = pthread_create(&tid2, NULL, thr_fn2, NULL);
    if ( err != 0 )
        err_exit(err, "can't create thread 2");
    sleep(1);
    printfoo("parent: \n", fp);

    exit(0);
}
